The issue
I had a couple of users groups and most users pushed into those groups - however I decided to simplify the user workflow and nuked all the groups, now existing users are not set to a user group, I checked the database and I can see my user is set to group id 1 (admin) and no rows for any other users.
I figured it would be a simple case of edit the user and just add them to 'Members' again (groupID 3) but I can only add users to admin, not members (this feels like an oversight)
in short whats the best way to get all users back into group id 3 (members) I assume an SQL query will be required to set it across all users then just edit myself back to group id 1 (admin)